Drizzle oil into cast-iron pot over medium to medium-high heat.
Add the bacon to the pot and brown. Remove and set it aside for later, leaving drippings in the pot.
Add the onion to the pot and cook slightly. Add chorizo into the pot and crumble it with a spatula as it cooks. When the chorizo is almost done, add in the ground beef, salt, ground black pepper and garlic.